Tool holder



Patented Nov. 26, 1935 UNITED STATES PATENroFFi-CE 2 Claims. (C 143-6) Many tool holders include in their construction an arm mounted for rising and falling movement and for turning movement in a horizontal plane in respect to a vertical axis. In constructions, with which I am familiar, the vertical axis consisted of a standard movable in respect to a fixed pedestal, and the arm was turnable in a horizontal plane about the standard. This construction required two joints each having finished surfaces. The principal object of the present invention is to cheapen and improve the accuracy of such tool holders, and to this and other ends hereinafter set forth or appearing the invention, generally stated, comprises a rigidly mounted standard having a single finished cylindrical joint surface, an arm having a single finished cylindrical joint surface, said finished joint surfaces arranged in sliding and turning contact, and a hand operated lifting and lowering screw mechanism turnably mounted on top of the standard and connected with the arm.

The invention also comprises the improvements to be presently described and finally claimed.

In the following description reference will be made to the accompanying drawings forming part hereof and in which,

Figure 1 is an elevational view partly in section of a tool holder embodying features of the invention,

Figure 2 is a similar view drawn to an enlarged scale and illustrating a modification.

Figure 3 is a transverse section taken on the line 3-3 in Fig. 1, and

Figure 4 is a view similar to Figure 1 illustrating another modification.

Referring to the drawings, and more particu-- larly to Figure 1, I is a standard shown as of tubular form and it is rigidly mounted on a pedestal 2. The standard I is provided with a single, finished, cylindrical, joint surface 3. 4 is an arm shown as provided at its lower edge with a rail 5, and this arm 4 is provided with a single finished cylindrical joint surface provided within the ring portion 6 of the arm which surrounds the finished joint surface 3. The portion 6 of the arm is shown as split and provided with a clamping means I by which it can be secured to and released for movement in respect to the standard I. The arm 4 is provided with a slidable key 2|, which, by engaging splines or elongated grooves 22, spaced forty-five degrees apart and provided in the standard I, serves to hold the arm 4 against turning in positions spaced fortyflve degrees apart; for intermediate positions use is made of the clamp 1. The finished joint surfaces are arranged in sliding and tuming contact. The fact that there are but two finished joint surfaces provides an economical construction and insures accuracy of operation. 8 is a 5 second arm which is shorter than the arm 4 and it is provided 'with a threaded opening 9. The arm 8 is turnably mounted on the standard I and, as shown it is connected to one element of an annular ball bearing of which the other ele- 10 'ment is connected with the standard. The

amount of angular movement is indicated by pointer 25 and scale 26. As shown in Figure 1 a post I0 is mounted as a cap on the standard I and the post is connected with the inner race of 15 the ball bearing, the outer race of the ball bearing is connected with the arm 8 and secured thereto by a plate ll. As shown in Figure 2 the outer race of the annular ball bearing is connected withthestandard by a flange I2 and plate 20 13. The inner race of the annular ball bearing is connected with the arm 8 by a post l4. I5 is a screw which engages the threaded opening 9 in the arm 8 and it is provided at one end with a'handle l6 and at the other end with a head ll 25 which is turnably mounted in the fitting l8 applied to the top of the arm 4. I9 is a carriage slidable on the rail .5 and from it depends the adjustable motor support 20 having pivots arranged ninety degrees apart and provided with 30 dial adjustments 20.

The purpose of the screw I5 is to raise and lower the arm 4 crime standard and to support it from the arm 8 for turning movement.

The construction and mode of operation of the 35 modification shown in Figure 4 are as above described except as follows:

The standard l is provided with an overhanging portion 23 which is equipped with the split sleeve 6 and with the clamping means i and the arm 4 is provided with a cylindrical post 24 having grooves 22 spaced forty-five degrees apart for cooperation with the key 2|. The finished cylindrical joint surfaces are arranged between 45 the post 24 and the split ring head 6 The screw [5 is mounted on the standard I, and the arm 8 isconnected by a bearing with the post 24 for turning but not for endwise motion.

It will be obvious to those skilled in'the art to 50 which the invention relates that modifications may be made in details of construction and ar rangement andin matters of mere form without departing from the spirit of the invention which is not limited in respect to such matters or other- I Nov. '26, 1935. s R ARGE 2,022,290

SHAFT MOUNTING Filed Dec. 5, 1951 2 Sheets-She et l fF/a. A-

ifl/l nu l 20 V 17/5 HTTORNE).

s. R. LARGE 2,022,290

SHAFT MOUNTING Filed Dec. 5, 1931 2 Sheets-Sheet 2 INVE/VTOR. SHMUEL if b19555 

